So I just installed a 2 Channel 1200 Watt Amp into my TC and ran 4 Guage Wire (Rockford Kit)to power it. I am going to be adding a 4 Channel Infinity 475 Watt amp shortly.

Do I need a Capacitor?

I know I need a Distrubution Block and run a higher gauge wire from Battery to the Distribution block then smaller gauge wire to the amps. Do I also need a fuse block?

 

You'll definitely want proper fuse protection for the system. I've commented on the "need" for capacitors, batteries, alternators, etc. countless times - please search.

The short answer is "no" - you don't need one, provided your wire is of the proper gauge, and your grounds are "good".